af_ieee802154: fix ioctl processing

fix two errors in ioctl processing:
1) if the ioctl isn't supported one should return -ENOIOCTLCMD
2) don't call ndo_do_ioctl if the device doesn't provide it

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>

diff --git a/net/ieee802154/af_ieee802154.c b/net/ieee802154/af_ieee802154.c
index 3bb6bdb..af66180 100644 (file)
--- a/net/ieee802154/af_ieee802154.c
+++ b/net/ieee802154/af_ieee802154.c
@@ -136,7 +136,7 @@ static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg,
                unsigned int cmd)
 {
        struct ifreq ifr;
-       int ret = -EINVAL;
+       int ret = -ENOIOCTLCMD;
        struct net_device *dev;
 
        if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
@@ -146,8 +146,10 @@ static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg,
 
        dev_load(sock_net(sk), ifr.ifr_name);
        dev = dev_get_by_name(sock_net(sk), ifr.ifr_name);
-       if (dev->type == ARPHRD_IEEE802154 ||
-           dev->type == ARPHRD_IEEE802154_PHY)
+
+       if ((dev->type == ARPHRD_IEEE802154 ||
+            dev->type == ARPHRD_IEEE802154_PHY) &&
+           dev->netdev_ops->ndo_do_ioctl)
                ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd);
 
        if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq)))